#!/bin/bash
#测试

#两个的测试，单引号和双引号必须有一个包含着另一个
echo "Let's us and who's is you"
echo '"wh are champion"'

#输出环境变量需要在环境变量的前面加上$
echo UID:$UID
echo HOME:$HOME
echo User user id id $UID
             
#输出$符号，要在前面加上\进行转义
echo $15
echo \$15

echo hello linux\\n


